Carb recommendations

I have a 650 double pumper I plan to run on my 340 for now but I'm wondering if I may need to step up to a 750.

What about adding a Proform body to my 650 ? Would I gain anything there ? I've already cut the choke down on the 650.

My combo is
340
9.5:1
Magnum Heads
Either my LD340 or anRPM AirGap
Comp XE274 .513/.523" lift with 1.6 rockers 110lsa
1-5/8 Headers 3" exhaust

10" converter (3000 stall)
3.91s 28" tire

I was looking at the 750 Mighty Demon but if 650 is enough I'l find another place to spend the $500